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linux/include/asm-s390/cio.h
Heiko Carstens a806170e29 [S390] Fix a lot of sparse warnings. 
Most noteable part of this commit is the new local header file entry.h
which contains all the function declarations of functions that get only
called from asm code or are arch internal. That way we can avoid extern
declarations in C files.
This is more or less the same that was done for sparc64.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2008-04-17 07:47:06 +02:00

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/*
* include/asm-s390/cio.h
* include/asm-s390x/cio.h
*
* Common interface for I/O on S/390
*/
#ifndef _ASM_S390_CIO_H_
#define _ASM_S390_CIO_H_
#include <linux/spinlock.h>
#include <asm/types.h>
#ifdef __KERNEL__
#define LPM_ANYPATH 0xff
#define __MAX_CSSID 0
/**
* struct scsw - subchannel status word
* @key: subchannel key
* @sctl: suspend control
* @eswf: esw format
* @cc: deferred condition code
* @fmt: format
* @pfch: prefetch
* @isic: initial-status interruption control
* @alcc: address-limit checking control
* @ssi: suppress-suspended interruption
* @zcc: zero condition code
* @ectl: extended control
* @pno: path not operational
* @res: reserved
* @fctl: function control
* @actl: activity control
* @stctl: status control
* @cpa: channel program address
* @dstat: device status
* @cstat: subchannel status
* @count: residual count
*/
struct scsw {
__u32 key : 4;
__u32 sctl : 1;
__u32 eswf : 1;
__u32 cc : 2;
__u32 fmt : 1;
__u32 pfch : 1;
__u32 isic : 1;
__u32 alcc : 1;
__u32 ssi : 1;
__u32 zcc : 1;
__u32 ectl : 1;
__u32 pno : 1;
__u32 res : 1;
__u32 fctl : 3;
__u32 actl : 7;
__u32 stctl : 5;
__u32 cpa;
__u32 dstat : 8;
__u32 cstat : 8;
__u32 count : 16;
} __attribute__ ((packed));
#define SCSW_FCTL_CLEAR_FUNC 0x1
#define SCSW_FCTL_HALT_FUNC 0x2
#define SCSW_FCTL_START_FUNC 0x4
#define SCSW_ACTL_SUSPENDED 0x1
#define SCSW_ACTL_DEVACT 0x2
#define SCSW_ACTL_SCHACT 0x4
#define SCSW_ACTL_CLEAR_PEND 0x8
#define SCSW_ACTL_HALT_PEND 0x10
#define SCSW_ACTL_START_PEND 0x20
#define SCSW_ACTL_RESUME_PEND 0x40
#define SCSW_STCTL_STATUS_PEND 0x1
#define SCSW_STCTL_SEC_STATUS 0x2
#define SCSW_STCTL_PRIM_STATUS 0x4
#define SCSW_STCTL_INTER_STATUS 0x8
#define SCSW_STCTL_ALERT_STATUS 0x10
#define DEV_STAT_ATTENTION 0x80
#define DEV_STAT_STAT_MOD 0x40
#define DEV_STAT_CU_END 0x20
#define DEV_STAT_BUSY 0x10
#define DEV_STAT_CHN_END 0x08
#define DEV_STAT_DEV_END 0x04
#define DEV_STAT_UNIT_CHECK 0x02
#define DEV_STAT_UNIT_EXCEP 0x01
#define SCHN_STAT_PCI 0x80
#define SCHN_STAT_INCORR_LEN 0x40
#define SCHN_STAT_PROG_CHECK 0x20
#define SCHN_STAT_PROT_CHECK 0x10
#define SCHN_STAT_CHN_DATA_CHK 0x08
#define SCHN_STAT_CHN_CTRL_CHK 0x04
#define SCHN_STAT_INTF_CTRL_CHK 0x02
#define SCHN_STAT_CHAIN_CHECK 0x01
/*
* architectured values for first sense byte
*/
#define SNS0_CMD_REJECT 0x80
#define SNS_CMD_REJECT SNS0_CMD_REJEC
#define SNS0_INTERVENTION_REQ 0x40
#define SNS0_BUS_OUT_CHECK 0x20
#define SNS0_EQUIPMENT_CHECK 0x10
#define SNS0_DATA_CHECK 0x08
#define SNS0_OVERRUN 0x04
#define SNS0_INCOMPL_DOMAIN 0x01
/*
* architectured values for second sense byte
*/
#define SNS1_PERM_ERR 0x80
#define SNS1_INV_TRACK_FORMAT 0x40
#define SNS1_EOC 0x20
#define SNS1_MESSAGE_TO_OPER 0x10
#define SNS1_NO_REC_FOUND 0x08
#define SNS1_FILE_PROTECTED 0x04
#define SNS1_WRITE_INHIBITED 0x02
#define SNS1_INPRECISE_END 0x01
/*
* architectured values for third sense byte
*/
#define SNS2_REQ_INH_WRITE 0x80
#define SNS2_CORRECTABLE 0x40
#define SNS2_FIRST_LOG_ERR 0x20
#define SNS2_ENV_DATA_PRESENT 0x10
#define SNS2_INPRECISE_END 0x04
/**
* struct ccw1 - channel command word
* @cmd_code: command code
* @flags: flags, like IDA adressing, etc.
* @count: byte count
* @cda: data address
*
* The ccw is the basic structure to build channel programs that perform
* operations with the device or the control unit. Only Format-1 channel
* command words are supported.
*/
struct ccw1 {
__u8 cmd_code;
__u8 flags;
__u16 count;
__u32 cda;
} __attribute__ ((packed,aligned(8)));
#define CCW_FLAG_DC 0x80
#define CCW_FLAG_CC 0x40
#define CCW_FLAG_SLI 0x20
#define CCW_FLAG_SKIP 0x10
#define CCW_FLAG_PCI 0x08
#define CCW_FLAG_IDA 0x04
#define CCW_FLAG_SUSPEND 0x02
#define CCW_CMD_READ_IPL 0x02
#define CCW_CMD_NOOP 0x03
#define CCW_CMD_BASIC_SENSE 0x04
#define CCW_CMD_TIC 0x08
#define CCW_CMD_STLCK 0x14
#define CCW_CMD_SENSE_PGID 0x34
#define CCW_CMD_SUSPEND_RECONN 0x5B
#define CCW_CMD_RDC 0x64
#define CCW_CMD_RELEASE 0x94
#define CCW_CMD_SET_PGID 0xAF
#define CCW_CMD_SENSE_ID 0xE4
#define CCW_CMD_DCTL 0xF3
#define SENSE_MAX_COUNT 0x20
/**
* struct erw - extended report word
* @res0: reserved
* @auth: authorization check
* @pvrf: path-verification-required flag
* @cpt: channel-path timeout
* @fsavf: failing storage address validity flag
* @cons: concurrent sense
* @scavf: secondary ccw address validity flag
* @fsaf: failing storage address format
* @scnt: sense count, if @cons == %1
* @res16: reserved
*/
struct erw {
__u32 res0 : 3;
__u32 auth : 1;
__u32 pvrf : 1;
__u32 cpt : 1;
__u32 fsavf : 1;
__u32 cons : 1;
__u32 scavf : 1;
__u32 fsaf : 1;
__u32 scnt : 6;
__u32 res16 : 16;
} __attribute__ ((packed));
/**
* struct sublog - subchannel logout area
* @res0: reserved
* @esf: extended status flags
* @lpum: last path used mask
* @arep: ancillary report
* @fvf: field-validity flags
* @sacc: storage access code
* @termc: termination code
* @devsc: device-status check
* @serr: secondary error
* @ioerr: i/o-error alert
* @seqc: sequence code
*/
struct sublog {
__u32 res0 : 1;
__u32 esf : 7;
__u32 lpum : 8;
__u32 arep : 1;
__u32 fvf : 5;
__u32 sacc : 2;
__u32 termc : 2;
__u32 devsc : 1;
__u32 serr : 1;
__u32 ioerr : 1;
__u32 seqc : 3;
} __attribute__ ((packed));
/**
* struct esw0 - Format 0 Extended Status Word (ESW)
* @sublog: subchannel logout
* @erw: extended report word
* @faddr: failing storage address
* @saddr: secondary ccw address
*/
struct esw0 {
struct sublog sublog;
struct erw erw;
__u32 faddr[2];
__u32 saddr;
} __attribute__ ((packed));
/**
* struct esw1 - Format 1 Extended Status Word (ESW)
* @zero0: reserved zeros
* @lpum: last path used mask
* @zero16: reserved zeros
* @erw: extended report word
* @zeros: three fullwords of zeros
*/
struct esw1 {
__u8 zero0;
__u8 lpum;
__u16 zero16;
struct erw erw;
__u32 zeros[3];
} __attribute__ ((packed));
/**
* struct esw2 - Format 2 Extended Status Word (ESW)
* @zero0: reserved zeros
* @lpum: last path used mask
* @dcti: device-connect-time interval
* @erw: extended report word
* @zeros: three fullwords of zeros
*/
struct esw2 {
__u8 zero0;
__u8 lpum;
__u16 dcti;
struct erw erw;
__u32 zeros[3];
} __attribute__ ((packed));
/**
* struct esw3 - Format 3 Extended Status Word (ESW)
* @zero0: reserved zeros
* @lpum: last path used mask
* @res: reserved
* @erw: extended report word
* @zeros: three fullwords of zeros
*/
struct esw3 {
__u8 zero0;
__u8 lpum;
__u16 res;
struct erw erw;
__u32 zeros[3];
} __attribute__ ((packed));
/**
* struct irb - interruption response block
* @scsw: subchannel status word
* @esw: extened status word, 4 formats
* @ecw: extended control word
*
* The irb that is handed to the device driver when an interrupt occurs. For
* solicited interrupts, the common I/O layer already performs checks whether
* a field is valid; a field not being valid is always passed as %0.
* If a unit check occured, @ecw may contain sense data; this is retrieved
* by the common I/O layer itself if the device doesn't support concurrent
* sense (so that the device driver never needs to perform basic sene itself).
* For unsolicited interrupts, the irb is passed as-is (expect for sense data,
* if applicable).
*/
struct irb {
struct scsw scsw;
union {
struct esw0 esw0;
struct esw1 esw1;
struct esw2 esw2;
struct esw3 esw3;
} esw;
__u8 ecw[32];
} __attribute__ ((packed,aligned(4)));
/**
* struct ciw - command information word (CIW) layout
* @et: entry type
* @reserved: reserved bits
* @ct: command type
* @cmd: command code
* @count: command count
*/
struct ciw {
__u32 et : 2;
__u32 reserved : 2;
__u32 ct : 4;
__u32 cmd : 8;
__u32 count : 16;
} __attribute__ ((packed));
#define CIW_TYPE_RCD 0x0 /* read configuration data */
#define CIW_TYPE_SII 0x1 /* set interface identifier */
#define CIW_TYPE_RNI 0x2 /* read node identifier */
/*
* Flags used as input parameters for do_IO()
*/
#define DOIO_ALLOW_SUSPEND 0x0001 /* allow for channel prog. suspend */
#define DOIO_DENY_PREFETCH 0x0002 /* don't allow for CCW prefetch */
#define DOIO_SUPPRESS_INTER 0x0004 /* suppress intermediate inter. */
/* ... for suspended CCWs */
/* Device or subchannel gone. */
#define CIO_GONE 0x0001
/* No path to device. */
#define CIO_NO_PATH 0x0002
/* Device has appeared. */
#define CIO_OPER 0x0004
/* Sick revalidation of device. */
#define CIO_REVALIDATE 0x0008
/**
* struct ccw_dev_id - unique identifier for ccw devices
* @ssid: subchannel set id
* @devno: device number
*
* This structure is not directly based on any hardware structure. The
* hardware identifies a device by its device number and its subchannel,
* which is in turn identified by its id. In order to get a unique identifier
* for ccw devices across subchannel sets, @struct ccw_dev_id has been
* introduced.
*/
struct ccw_dev_id {
u8 ssid;
u16 devno;
};
/**
* ccw_device_id_is_equal() - compare two ccw_dev_ids
* @dev_id1: a ccw_dev_id
* @dev_id2: another ccw_dev_id
* Returns:
* %1 if the two structures are equal field-by-field,
* %0 if not.
* Context:
* any
*/
static inline int ccw_dev_id_is_equal(struct ccw_dev_id *dev_id1,
struct ccw_dev_id *dev_id2)
{
if ((dev_id1->ssid == dev_id2->ssid) &&
(dev_id1->devno == dev_id2->devno))
return 1;
return 0;
}
extern void wait_cons_dev(void);
extern void css_schedule_reprobe(void);
extern void reipl_ccw_dev(struct ccw_dev_id *id);
struct cio_iplinfo {
u16 devno;
int is_qdio;
};
extern int cio_get_iplinfo(struct cio_iplinfo *iplinfo);
/* Function from drivers/s390/cio/chsc.c */
int chsc_sstpc(void *page, unsigned int op, u16 ctrl);
int chsc_sstpi(void *page, void *result, size_t size);
#endif
#endif
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